1978 XS 400 US Version - Rear Brake Master Cylinder Rebuild Kit

donzimmer

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Hello Fellow Gearheads,

I recently picked up this 78 XS400 for a smoking cost of just 400 bucks, with only 3548 miles with a clean title. That's the good. A truly original unmolested example. Great start for a project. 140-145 compression both cylinders and they look clean.

The Bad: Brakes all around need a complete rebuild and I cannot for the life of me find an available kit to rebuild the rear brake master cylinder. I've tried CSMNL, Z1, Yambits, Ebay, Amazon, etc.

Anybody out there have a secret source they'd care to share? The lip of the piston in the master broke on disassembly. That part seems to be unobtainium.

Thanks,
Don Z
2023 Kawasaki KLR650
1978 Honda CX500 x 2
1976 Honda CB750 x 2
1978 Honda CB750
1980 Kawasaki KZ440
1978 Yamaha XS400
1975 Kawasaki KZ400
1974 Kawasaki 350 S2 Mach II
 
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